Move c_src dirs back to toplevel

[bcachefs-tools-debian] / c_src / linux / kthread.c

diff --git a/c_src/linux/kthread.c b/c_src/linux/kthread.c
deleted file mode 100644 (file)
index 17830e5..0000000
--- a/c_src/linux/kthread.c
+++ /dev/null
@@ -1,139 +0,0 @@
-#include <pthread.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <linux/bitops.h>
-#include <linux/kthread.h>
-#include <linux/rcupdate.h>
-#include <linux/sched.h>
-
-#include "tools-util.h"
-
-enum KTHREAD_BITS {
-       KTHREAD_IS_PER_CPU = 0,
-       KTHREAD_SHOULD_STOP,
-       KTHREAD_SHOULD_PARK,
-       KTHREAD_IS_PARKED,
-};
-
-static void *kthread_start_fn(void *data)
-{
-       rcu_register_thread();
-
-       current = data;
-       schedule();
-       current->thread_fn(current->thread_data);
-
-       complete(&current->exited);
-       put_task_struct(current);
-       rcu_unregister_thread();
-       return NULL;
-}
-
-/**
- * kthread_create_on_node - create a kthread.
- * @threadfn: the function to run until signal_pending(current).
- * @data: data ptr for @threadfn.
- * @node: task and thread structures for the thread are allocated on this node
- * @namefmt: printf-style name for the thread.
- *
- * Description: This helper function creates and names a kernel
- * thread.  The thread will be stopped: use wake_up_process() to start
- * it.  See also kthread_run().  The new thread has SCHED_NORMAL policy and
- * is affine to all CPUs.
- *
- * If thread is going to be bound on a particular cpu, give its node
- * in @node, to get NUMA affinity for kthread stack, or else give NUMA_NO_NODE.
- * When woken, the thread will run @threadfn() with @data as its
- * argument. @threadfn() can either call do_exit() directly if it is a
- * standalone thread for which no one will call kthread_stop(), or
- * return when 'kthread_should_stop()' is true (which means
- * kthread_stop() has been called).  The return value should be zero
- * or a negative error number; it will be passed to kthread_stop().
- *
- * Returns a task_struct or ERR_PTR(-ENOMEM) or ERR_PTR(-EINTR).
- */
-struct task_struct *kthread_create(int (*thread_fn)(void *data),
-                                  void *thread_data,
-                                  const char namefmt[], ...)
-{
-       va_list args;
-       struct task_struct *p = malloc(sizeof(*p));
-       int ret;
-
-       memset(p, 0, sizeof(*p));
-
-       va_start(args, namefmt);
-       vsnprintf(p->comm, sizeof(p->comm), namefmt, args);
-       va_end(args);
-
-       p->flags        |= PF_KTHREAD;
-       p->thread_fn    = thread_fn;
-       p->thread_data  = thread_data;
-       p->state        = TASK_UNINTERRUPTIBLE;
-       p->signal       = &p->_signal;
-       atomic_set(&p->usage, 1);
-       init_completion(&p->exited);
-       init_rwsem(&p->_signal.exec_update_lock);
-
-       pthread_attr_t attr;
-       pthread_attr_init(&attr);
-       pthread_attr_setstacksize(&attr, 32 << 10);
-
-       for (unsigned i = 0; i < 10; i++) {
-               ret = pthread_create(&p->thread, &attr, kthread_start_fn, p);
-               if (!ret)
-                       break;
-
-               run_shrinkers(GFP_KERNEL, true);
-       }
-       if (ret)
-               return ERR_PTR(-ret);
-       pthread_setname_np(p->thread, p->comm);
-       return p;
-}
-
-/**
- * kthread_should_stop - should this kthread return now?
- *
- * When someone calls kthread_stop() on your kthread, it will be woken
- * and this will return true.  You should then return, and your return
- * value will be passed through to kthread_stop().
- */
-bool kthread_should_stop(void)
-{
-       return test_bit(KTHREAD_SHOULD_STOP, &current->kthread_flags);
-}
-
-bool kthread_freezable_should_stop(bool *was_frozen)
-{
-       return test_bit(KTHREAD_SHOULD_STOP, &current->kthread_flags);
-}
-
-/**
- * kthread_stop - stop a thread created by kthread_create().
- * @k: thread created by kthread_create().
- *
- * Sets kthread_should_stop() for @k to return true, wakes it, and
- * waits for it to exit. This can also be called after kthread_create()
- * instead of calling wake_up_process(): the thread will exit without
- * calling threadfn().
- *
- * If threadfn() may call do_exit() itself, the caller must ensure
- * task_struct can't go away.
- *
- * Returns the result of threadfn(), or %-EINTR if wake_up_process()
- * was never called.
- */
-int kthread_stop(struct task_struct *p)
-{
-       get_task_struct(p);
-
-       set_bit(KTHREAD_SHOULD_STOP, &p->kthread_flags);
-       wake_up_process(p);
-       wait_for_completion(&p->exited);
-
-       put_task_struct(p);
-
-       return 0;
-}